Billet shears



June 22 1926.

H. PELS BILLET SHEARS Filed July '7, 1924 m m I Patented June 22, 1926.

UNITED STATES HENRY IELS, F BERLIN-CHARLOTTENBURG, GERMANY.

BILLET SHEARS.

Application filed July 7, 1924, Serial No. 724,710, and. in Germany May 3, 1924.

The billet shears according to the invention are intended to serve to cut billets at the hot state in which they are when coming from the rolling mill, and without the necessity to raise or lower said billets. With this object in view the shears are to be mounted at the end of the roll train or in the roll train of a mill. train. The billet shears have a fran'ie with a wide enclosed mouth at the front end at which the stationary counter knife is arranged, the reciprocating knife being arranged so that it can be completely swung out of the mouth orifice of the machine and it is operated by a toggle lever arrangement in such a manner that the reciprocating knife is brought into the working position by the stretching of the toggle levers so that the force of the toggle levers is transmitted to the reciprocating knife in the most favorable manner, as in this position the approxin'iately stretched toggle levers have to execute only a short movement and are capable of exerting a very energetic pressure.

From this toggle lever arrangement results further a rapid return movei'nent of the reciprocating knife from the working position into the position of rest, the knife being withdrawn for such a distance that, at the position of rest, it leaves the mouth orifice of the billet shears completely free.

An embodiment of the invention is shown by way of example in the accompanying drawing, in which:

Fig. 1 shows the improved billet shears in elevation.

Fig. 2 is a cross section through the toggle lovers.

1 The frame 1 of the machine comprises the wide inclosed mouth 2 and a stationary knife 3 fixedon the front end of this mouth. The billet 4 to be cut is pressed against this stationary knife. The reciprocating knife 5 is fixed on the front end of a one-armed lever 6 pivotaily mounted on a pivot axle 7 The movement of this reciprocating knife 5 is controlled by a pair of toggle levers 8, 9. The lever 9 is pivotally mounted on a pivot pin 10 fixed on the knife lever 6 and p votally connected by means of a hinge pin 11 with one end of the lever 8 which is at its other end mounted at 12 on the frame of the machine. A. rod 13 is pivotally mounted at one end on the hinge pin 11, the crank or eccentric 14 of a shaft 15 acting on the other end of said rod 13 to move the same up and down. The shaft 15 is driven in any convenient manner. By the crank pin or eccentric 14 the rod 13 is pulled so that the toggle levers 8, 9 are brought into the stretched position and the reciprocating lever 6 with knife 5 is moved towards the stationary knife 4. Owing to the toggle levers 8, 9 operated by rod 13 and crank pin or eccentric 14 the movement executed by the reciprocating lever 6 is regulated in such a manner that when the toggle levers are folded the knife is pulled back to the inner end of the mouth 2. At each side of the billet shears a roller 16 can be arranged which serves for supporting the billet 4.

I claim v 1. A billet shears comprising, in combination, a machine frame having a Wide inclosed mouth, a stationary knife fixed in one end of said mouth, a reciprocating knife mounted to swing in an arcuate path, normally located at the opposite'end of, and clear of, said mouth, and means for operating said reciprocating knife to move it in an arcuate path across said mouth toward, and to cooperate with, said stationary knife and to return it to normal position clear of said mouth, the path of movement of said reciprocating knife embracing the entire area of said mouth.

2. A billet shears comprising, in combination, a machine frame having a wide inclosed mouth, a stationary knife fixed in one end of said mouth, a reciprocating lever pivotally mounted on the machine frame and. swinging in an arcuate path about its pivot, toggle levers pivotally connected with each other and with said reciprocating swinging lever and a fixed object respectively, an operating lever, a common pivot pin connecting 

